42189232417 has 2 divisors, whose sum is σ = 42189232418. Its totient is φ = 42189232416.

The previous prime is 42189232403. The next prime is 42189232427. The reversal of 42189232417 is 71423298124.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42054115041 + 135117376 = 205071^2 + 11624^2 .

It is a cyclic number.

It is not a de Polignac number, because 42189232417 - 2⁷ = 42189232289 is a prime.

It is not a weakly prime, because it can be changed into another prime (42189232427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21094616208 + 21094616209.

It is an arithmetic number, because the mean of its divisors is an integer number (21094616209).

Almost surely, 2^42189232417 is an apocalyptic number.

It is an amenable number.

42189232417 is a deficient number, since it is larger than the sum of its proper divisors (1).

42189232417 is an equidigital number, since it uses as much as digits as its factorization.

42189232417 is an evil number, because the sum of its binary digits is even.

The product of its digits is 193536, while the sum is 43.

The spelling of 42189232417 in words is "forty-two billion, one hundred eighty-nine million, two hundred thirty-two thousand, four hundred seventeen".